crossed product

About the Amenability of the Crossed Product by Coaction

关于余作用交叉积的顺从性

A mule is the product of a horse crossed with a donkey.

骡是马和驴杂交的产物。

The Center of Crossed Product and Galois Extension of Rings

交叉积的中心与环的Galois扩张

Throughout this paper, we work over a fixed field k. Let H be a finite dimensional cocommutative Hopf algebra and A an H-module algebra. A#~ H is the associated crossed product.

设H是域k上的有限维余交换Hopf代数，A是H-模代数，AσH是相应的crossed积。

Lastly, we discuss the factor type of this crossed product when it is a factor.

最后讨论该交叉积为因子时究竟是几型因子。

On Semidirect Product of Discrete Groups and Crossed Product of von Neumann Algebras

关于离散群的半直积与von Neumann代数的交叉积

Crossed product and twisted H-module. At the same time, we give Lemmas 1.3. 1.5 and 1.6 being used in the following sections.

文中在给出了弱作用、crossed积、twisted H-模等基本概念的同时，又给出了在后续中需要使用的一些引理，即引理1.3、引理1.5、引理1.6。